Theorem fz1isolem 13445

Description: Lemma for fz1iso 13446. (Contributed by Mario Carneiro, 2-Apr-2014.)

Hypotheses

Ref	Expression
fz1iso.1	⊢ 𝐺 = (rec((𝑛 ∈ V ↦ (𝑛 + 1)), 1) ↾ ω)
fz1iso.2	⊢ 𝐵 = (ℕ ∩ (◡ < “ {((♯‘𝐴) + 1)}))
fz1iso.3	⊢ 𝐶 = (ω ∩ (◡𝐺‘((♯‘𝐴) + 1)))
fz1iso.4	⊢ 𝑂 = OrdIso(𝑅, 𝐴)

Assertion

Ref	Expression
fz1isolem	⊢ ((𝑅 Or 𝐴 ∧ 𝐴 ∈ Fin) → ∃𝑓 𝑓 Isom < , 𝑅 ((1...(♯‘𝐴)), 𝐴))

Distinct variable groups:   𝑓,𝑛,𝐴   𝐵,𝑓   𝑓,𝐺   𝑓,𝑂   𝑅,𝑓

Allowed substitution hints:   𝐵(𝑛)   𝐶(𝑓,𝑛)   𝑅(𝑛)   𝐺(𝑛)   𝑂(𝑛)

Proof of Theorem fz1isolem

Step	Hyp	Ref	Expression
1		hashcl 13348	. . . . . . . . 9 ⊢ (𝐴 ∈ Fin → (♯‘𝐴) ∈ ℕ0)
2	1	adantl 473	. . . . . . . 8 ⊢ ((𝑅 Or 𝐴 ∧ 𝐴 ∈ Fin) → (♯‘𝐴) ∈ ℕ0)
3		nnuz 11922	. . . . . . . . . . 11 ⊢ ℕ = (ℤ≥‘1)
4		1z 11653	. . . . . . . . . . . . 13 ⊢ 1 ∈ ℤ
5		fz1iso.1	. . . . . . . . . . . . 13 ⊢ 𝐺 = (rec((𝑛 ∈ V ↦ (𝑛 + 1)), 1) ↾ ω)
6	4, 5	om2uzisoi 12960	. . . . . . . . . . . 12 ⊢ 𝐺 Isom E , < (ω, (ℤ≥‘1))
7		isoeq5 6762	. . . . . . . . . . . 12 ⊢ (ℕ = (ℤ≥‘1) → (𝐺 Isom E , < (ω, ℕ) ↔ 𝐺 Isom E , < (ω, (ℤ≥‘1))))
8	6, 7	mpbiri 249	. . . . . . . . . . 11 ⊢ (ℕ = (ℤ≥‘1) → 𝐺 Isom E , < (ω, ℕ))
9	3, 8	ax-mp 5	. . . . . . . . . 10 ⊢ 𝐺 Isom E , < (ω, ℕ)
10		isocnv 6771	. . . . . . . . . 10 ⊢ (𝐺 Isom E , < (ω, ℕ) → ◡𝐺 Isom < , E (ℕ, ω))
11	9, 10	ax-mp 5	. . . . . . . . 9 ⊢ ◡𝐺 Isom < , E (ℕ, ω)
12		nn0p1nn 11578	. . . . . . . . 9 ⊢ ((♯‘𝐴) ∈ ℕ0 → ((♯‘𝐴) + 1) ∈ ℕ)
13		fz1iso.2	. . . . . . . . . 10 ⊢ 𝐵 = (ℕ ∩ (◡ < “ {((♯‘𝐴) + 1)}))
14		fz1iso.3	. . . . . . . . . . 11 ⊢ 𝐶 = (ω ∩ (◡𝐺‘((♯‘𝐴) + 1)))
15		fvex 6387	. . . . . . . . . . . . 13 ⊢ (◡𝐺‘((♯‘𝐴) + 1)) ∈ V
16	15	epini 5676	. . . . . . . . . . . 12 ⊢ (◡ E “ {(◡𝐺‘((♯‘𝐴) + 1))}) = (◡𝐺‘((♯‘𝐴) + 1))
17	16	ineq2i 3972	. . . . . . . . . . 11 ⊢ (ω ∩ (◡ E “ {(◡𝐺‘((♯‘𝐴) + 1))})) = (ω ∩ (◡𝐺‘((♯‘𝐴) + 1)))
18	14, 17	eqtr4i 2789	. . . . . . . . . 10 ⊢ 𝐶 = (ω ∩ (◡ E “ {(◡𝐺‘((♯‘𝐴) + 1))}))
19	13, 18	isoini2 6780	. . . . . . . . 9 ⊢ ((◡𝐺 Isom < , E (ℕ, ω) ∧ ((♯‘𝐴) + 1) ∈ ℕ) → (◡𝐺 ↾ 𝐵) Isom < , E (𝐵, 𝐶))
20	11, 12, 19	sylancr 581	. . . . . . . 8 ⊢ ((♯‘𝐴) ∈ ℕ0 → (◡𝐺 ↾ 𝐵) Isom < , E (𝐵, 𝐶))
21	2, 20	syl 17	. . . . . . 7 ⊢ ((𝑅 Or 𝐴 ∧ 𝐴 ∈ Fin) → (◡𝐺 ↾ 𝐵) Isom < , E (𝐵, 𝐶))
22		nnz 11645	. . . . . . . . . . . . 13 ⊢ (𝑓 ∈ ℕ → 𝑓 ∈ ℤ)
23	2	nn0zd 11726	. . . . . . . . . . . . 13 ⊢ ((𝑅 Or 𝐴 ∧ 𝐴 ∈ Fin) → (♯‘𝐴) ∈ ℤ)
24		eluz 11899	. . . . . . . . . . . . 13 ⊢ ((𝑓 ∈ ℤ ∧ (♯‘𝐴) ∈ ℤ) → ((♯‘𝐴) ∈ (ℤ≥‘𝑓) ↔ 𝑓 ≤ (♯‘𝐴)))
25	22, 23, 24	syl2anr 590	. . . . . . . . . . . 12 ⊢ (((𝑅 Or 𝐴 ∧ 𝐴 ∈ Fin) ∧ 𝑓 ∈ ℕ) → ((♯‘𝐴) ∈ (ℤ≥‘𝑓) ↔ 𝑓 ≤ (♯‘𝐴)))
26		zleltp1 11674	. . . . . . . . . . . . . 14 ⊢ ((𝑓 ∈ ℤ ∧ (♯‘𝐴) ∈ ℤ) → (𝑓 ≤ (♯‘𝐴) ↔ 𝑓 < ((♯‘𝐴) + 1)))
27	22, 23, 26	syl2anr 590	. . . . . . . . . . . . 13 ⊢ (((𝑅 Or 𝐴 ∧ 𝐴 ∈ Fin) ∧ 𝑓 ∈ ℕ) → (𝑓 ≤ (♯‘𝐴) ↔ 𝑓 < ((♯‘𝐴) + 1)))
28		ovex 6873	. . . . . . . . . . . . . 14 ⊢ ((♯‘𝐴) + 1) ∈ V
29		vex 3352	. . . . . . . . . . . . . . 15 ⊢ 𝑓 ∈ V
30	29	eliniseg 5675	. . . . . . . . . . . . . 14 ⊢ (((♯‘𝐴) + 1) ∈ V → (𝑓 ∈ (◡ < “ {((♯‘𝐴) + 1)}) ↔ 𝑓 < ((♯‘𝐴) + 1)))
31	28, 30	ax-mp 5	. . . . . . . . . . . . 13 ⊢ (𝑓 ∈ (◡ < “ {((♯‘𝐴) + 1)}) ↔ 𝑓 < ((♯‘𝐴) + 1))
32	27, 31	syl6bbr 280	. . . . . . . . . . . 12 ⊢ (((𝑅 Or 𝐴 ∧ 𝐴 ∈ Fin) ∧ 𝑓 ∈ ℕ) → (𝑓 ≤ (♯‘𝐴) ↔ 𝑓 ∈ (◡ < “ {((♯‘𝐴) + 1)})))
33	25, 32	bitr2d 271	. . . . . . . . . . 11 ⊢ (((𝑅 Or 𝐴 ∧ 𝐴 ∈ Fin) ∧ 𝑓 ∈ ℕ) → (𝑓 ∈ (◡ < “ {((♯‘𝐴) + 1)}) ↔ (♯‘𝐴) ∈ (ℤ≥‘𝑓)))
34	33	pm5.32da 574	. . . . . . . . . 10 ⊢ ((𝑅 Or 𝐴 ∧ 𝐴 ∈ Fin) → ((𝑓 ∈ ℕ ∧ 𝑓 ∈ (◡ < “ {((♯‘𝐴) + 1)})) ↔ (𝑓 ∈ ℕ ∧ (♯‘𝐴) ∈ (ℤ≥‘𝑓))))
35	13	elin2 3962	. . . . . . . . . 10 ⊢ (𝑓 ∈ 𝐵 ↔ (𝑓 ∈ ℕ ∧ 𝑓 ∈ (◡ < “ {((♯‘𝐴) + 1)})))
36		elfzuzb 12542	. . . . . . . . . . 11 ⊢ (𝑓 ∈ (1...(♯‘𝐴)) ↔ (𝑓 ∈ (ℤ≥‘1) ∧ (♯‘𝐴) ∈ (ℤ≥‘𝑓)))
37		elnnuz 11923	. . . . . . . . . . . 12 ⊢ (𝑓 ∈ ℕ ↔ 𝑓 ∈ (ℤ≥‘1))
38	37	anbi1i 617	. . . . . . . . . . 11 ⊢ ((𝑓 ∈ ℕ ∧ (♯‘𝐴) ∈ (ℤ≥‘𝑓)) ↔ (𝑓 ∈ (ℤ≥‘1) ∧ (♯‘𝐴) ∈ (ℤ≥‘𝑓)))
39	36, 38	bitr4i 269	. . . . . . . . . 10 ⊢ (𝑓 ∈ (1...(♯‘𝐴)) ↔ (𝑓 ∈ ℕ ∧ (♯‘𝐴) ∈ (ℤ≥‘𝑓)))
40	34, 35, 39	3bitr4g 305	. . . . . . . . 9 ⊢ ((𝑅 Or 𝐴 ∧ 𝐴 ∈ Fin) → (𝑓 ∈ 𝐵 ↔ 𝑓 ∈ (1...(♯‘𝐴))))
41	40	eqrdv 2762	. . . . . . . 8 ⊢ ((𝑅 Or 𝐴 ∧ 𝐴 ∈ Fin) → 𝐵 = (1...(♯‘𝐴)))
42		isoeq4 6761	. . . . . . . 8 ⊢ (𝐵 = (1...(♯‘𝐴)) → ((◡𝐺 ↾ 𝐵) Isom < , E (𝐵, 𝐶) ↔ (◡𝐺 ↾ 𝐵) Isom < , E ((1...(♯‘𝐴)), 𝐶)))
43	41, 42	syl 17	. . . . . . 7 ⊢ ((𝑅 Or 𝐴 ∧ 𝐴 ∈ Fin) → ((◡𝐺 ↾ 𝐵) Isom < , E (𝐵, 𝐶) ↔ (◡𝐺 ↾ 𝐵) Isom < , E ((1...(♯‘𝐴)), 𝐶)))
44	21, 43	mpbid 223	. . . . . 6 ⊢ ((𝑅 Or 𝐴 ∧ 𝐴 ∈ Fin) → (◡𝐺 ↾ 𝐵) Isom < , E ((1...(♯‘𝐴)), 𝐶))
45		fz1iso.4	. . . . . . . . . . . . . . . . . 18 ⊢ 𝑂 = OrdIso(𝑅, 𝐴)
46	45	oion 8647	. . . . . . . . . . . . . . . . 17 ⊢ (𝐴 ∈ Fin → dom 𝑂 ∈ On)
47	46	adantl 473	. . . . . . . . . . . . . . . 16 ⊢ ((𝑅 Or 𝐴 ∧ 𝐴 ∈ Fin) → dom 𝑂 ∈ On)
48		simpr 477	. . . . . . . . . . . . . . . . 17 ⊢ ((𝑅 Or 𝐴 ∧ 𝐴 ∈ Fin) → 𝐴 ∈ Fin)
49		wofi 8415	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝑅 Or 𝐴 ∧ 𝐴 ∈ Fin) → 𝑅 We 𝐴)
50	45	oien 8649	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝐴 ∈ Fin ∧ 𝑅 We 𝐴) → dom 𝑂 ≈ 𝐴)
51	48, 49, 50	syl2anc 579	. . . . . . . . . . . . . . . . 17 ⊢ ((𝑅 Or 𝐴 ∧ 𝐴 ∈ Fin) → dom 𝑂 ≈ 𝐴)
52		enfii 8383	. . . . . . . . . . . . . . . . 17 ⊢ ((𝐴 ∈ Fin ∧ dom 𝑂 ≈ 𝐴) → dom 𝑂 ∈ Fin)
53	48, 51, 52	syl2anc 579	. . . . . . . . . . . . . . . 16 ⊢ ((𝑅 Or 𝐴 ∧ 𝐴 ∈ Fin) → dom 𝑂 ∈ Fin)
54	47, 53	elind 3959	. . . . . . . . . . . . . . 15 ⊢ ((𝑅 Or 𝐴 ∧ 𝐴 ∈ Fin) → dom 𝑂 ∈ (On ∩ Fin))
55		onfin2 8358	. . . . . . . . . . . . . . 15 ⊢ ω = (On ∩ Fin)
56	54, 55	syl6eleqr 2854	. . . . . . . . . . . . . 14 ⊢ ((𝑅 Or 𝐴 ∧ 𝐴 ∈ Fin) → dom 𝑂 ∈ ω)
57		eqid 2764	. . . . . . . . . . . . . . . 16 ⊢ (rec((𝑛 ∈ V ↦ (𝑛 + 1)), 0) ↾ ω) = (rec((𝑛 ∈ V ↦ (𝑛 + 1)), 0) ↾ ω)
58		0z 11634	. . . . . . . . . . . . . . . 16 ⊢ 0 ∈ ℤ
59	5, 57, 4, 58	uzrdgxfr 12973	. . . . . . . . . . . . . . 15 ⊢ (dom 𝑂 ∈ ω → (𝐺‘dom 𝑂) = (((rec((𝑛 ∈ V ↦ (𝑛 + 1)), 0) ↾ ω)‘dom 𝑂) + (1 − 0)))
60		1m0e1 11399	. . . . . . . . . . . . . . . 16 ⊢ (1 − 0) = 1
61	60	oveq2i 6852	. . . . . . . . . . . . . . 15 ⊢ (((rec((𝑛 ∈ V ↦ (𝑛 + 1)), 0) ↾ ω)‘dom 𝑂) + (1 − 0)) = (((rec((𝑛 ∈ V ↦ (𝑛 + 1)), 0) ↾ ω)‘dom 𝑂) + 1)
62	59, 61	syl6eq 2814	. . . . . . . . . . . . . 14 ⊢ (dom 𝑂 ∈ ω → (𝐺‘dom 𝑂) = (((rec((𝑛 ∈ V ↦ (𝑛 + 1)), 0) ↾ ω)‘dom 𝑂) + 1))
63	56, 62	syl 17	. . . . . . . . . . . . 13 ⊢ ((𝑅 Or 𝐴 ∧ 𝐴 ∈ Fin) → (𝐺‘dom 𝑂) = (((rec((𝑛 ∈ V ↦ (𝑛 + 1)), 0) ↾ ω)‘dom 𝑂) + 1))
64	51	ensymd 8210	. . . . . . . . . . . . . . . . 17 ⊢ ((𝑅 Or 𝐴 ∧ 𝐴 ∈ Fin) → 𝐴 ≈ dom 𝑂)
65		cardennn 9059	. . . . . . . . . . . . . . . . 17 ⊢ ((𝐴 ≈ dom 𝑂 ∧ dom 𝑂 ∈ ω) → (card‘𝐴) = dom 𝑂)
66	64, 56, 65	syl2anc 579	. . . . . . . . . . . . . . . 16 ⊢ ((𝑅 Or 𝐴 ∧ 𝐴 ∈ Fin) → (card‘𝐴) = dom 𝑂)
67	66	fveq2d 6378	. . . . . . . . . . . . . . 15 ⊢ ((𝑅 Or 𝐴 ∧ 𝐴 ∈ Fin) → ((rec((𝑛 ∈ V ↦ (𝑛 + 1)), 0) ↾ ω)‘(card‘𝐴)) = ((rec((𝑛 ∈ V ↦ (𝑛 + 1)), 0) ↾ ω)‘dom 𝑂))
68	57	hashgval 13323	. . . . . . . . . . . . . . . 16 ⊢ (𝐴 ∈ Fin → ((rec((𝑛 ∈ V ↦ (𝑛 + 1)), 0) ↾ ω)‘(card‘𝐴)) = (♯‘𝐴))
69	68	adantl 473	. . . . . . . . . . . . . . 15 ⊢ ((𝑅 Or 𝐴 ∧ 𝐴 ∈ Fin) → ((rec((𝑛 ∈ V ↦ (𝑛 + 1)), 0) ↾ ω)‘(card‘𝐴)) = (♯‘𝐴))
70	67, 69	eqtr3d 2800	. . . . . . . . . . . . . 14 ⊢ ((𝑅 Or 𝐴 ∧ 𝐴 ∈ Fin) → ((rec((𝑛 ∈ V ↦ (𝑛 + 1)), 0) ↾ ω)‘dom 𝑂) = (♯‘𝐴))
71	70	oveq1d 6856	. . . . . . . . . . . . 13 ⊢ ((𝑅 Or 𝐴 ∧ 𝐴 ∈ Fin) → (((rec((𝑛 ∈ V ↦ (𝑛 + 1)), 0) ↾ ω)‘dom 𝑂) + 1) = ((♯‘𝐴) + 1))
72	63, 71	eqtrd 2798	. . . . . . . . . . . 12 ⊢ ((𝑅 Or 𝐴 ∧ 𝐴 ∈ Fin) → (𝐺‘dom 𝑂) = ((♯‘𝐴) + 1))
73	72	fveq2d 6378	. . . . . . . . . . 11 ⊢ ((𝑅 Or 𝐴 ∧ 𝐴 ∈ Fin) → (◡𝐺‘(𝐺‘dom 𝑂)) = (◡𝐺‘((♯‘𝐴) + 1)))
74		isof1o 6764	. . . . . . . . . . . . 13 ⊢ (𝐺 Isom E , < (ω, ℕ) → 𝐺:ω–1-1-onto→ℕ)
75	9, 74	ax-mp 5	. . . . . . . . . . . 12 ⊢ 𝐺:ω–1-1-onto→ℕ
76		f1ocnvfv1 6723	. . . . . . . . . . . 12 ⊢ ((𝐺:ω–1-1-onto→ℕ ∧ dom 𝑂 ∈ ω) → (◡𝐺‘(𝐺‘dom 𝑂)) = dom 𝑂)
77	75, 56, 76	sylancr 581	. . . . . . . . . . 11 ⊢ ((𝑅 Or 𝐴 ∧ 𝐴 ∈ Fin) → (◡𝐺‘(𝐺‘dom 𝑂)) = dom 𝑂)
78	73, 77	eqtr3d 2800	. . . . . . . . . 10 ⊢ ((𝑅 Or 𝐴 ∧ 𝐴 ∈ Fin) → (◡𝐺‘((♯‘𝐴) + 1)) = dom 𝑂)
79	78	ineq2d 3975	. . . . . . . . 9 ⊢ ((𝑅 Or 𝐴 ∧ 𝐴 ∈ Fin) → (ω ∩ (◡𝐺‘((♯‘𝐴) + 1))) = (ω ∩ dom 𝑂))
80		ordom 7271	. . . . . . . . . . 11 ⊢ Ord ω
81		ordelss 5923	. . . . . . . . . . 11 ⊢ ((Ord ω ∧ dom 𝑂 ∈ ω) → dom 𝑂 ⊆ ω)
82	80, 56, 81	sylancr 581	. . . . . . . . . 10 ⊢ ((𝑅 Or 𝐴 ∧ 𝐴 ∈ Fin) → dom 𝑂 ⊆ ω)
83		sseqin2 3978	. . . . . . . . . 10 ⊢ (dom 𝑂 ⊆ ω ↔ (ω ∩ dom 𝑂) = dom 𝑂)
84	82, 83	sylib 209	. . . . . . . . 9 ⊢ ((𝑅 Or 𝐴 ∧ 𝐴 ∈ Fin) → (ω ∩ dom 𝑂) = dom 𝑂)
85	79, 84	eqtrd 2798	. . . . . . . 8 ⊢ ((𝑅 Or 𝐴 ∧ 𝐴 ∈ Fin) → (ω ∩ (◡𝐺‘((♯‘𝐴) + 1))) = dom 𝑂)
86	14, 85	syl5eq 2810	. . . . . . 7 ⊢ ((𝑅 Or 𝐴 ∧ 𝐴 ∈ Fin) → 𝐶 = dom 𝑂)
87		isoeq5 6762	. . . . . . 7 ⊢ (𝐶 = dom 𝑂 → ((◡𝐺 ↾ 𝐵) Isom < , E ((1...(♯‘𝐴)), 𝐶) ↔ (◡𝐺 ↾ 𝐵) Isom < , E ((1...(♯‘𝐴)), dom 𝑂)))
88	86, 87	syl 17	. . . . . 6 ⊢ ((𝑅 Or 𝐴 ∧ 𝐴 ∈ Fin) → ((◡𝐺 ↾ 𝐵) Isom < , E ((1...(♯‘𝐴)), 𝐶) ↔ (◡𝐺 ↾ 𝐵) Isom < , E ((1...(♯‘𝐴)), dom 𝑂)))
89	44, 88	mpbid 223	. . . . 5 ⊢ ((𝑅 Or 𝐴 ∧ 𝐴 ∈ Fin) → (◡𝐺 ↾ 𝐵) Isom < , E ((1...(♯‘𝐴)), dom 𝑂))
90	45	oiiso 8648	. . . . . 6 ⊢ ((𝐴 ∈ Fin ∧ 𝑅 We 𝐴) → 𝑂 Isom E , 𝑅 (dom 𝑂, 𝐴))
91	48, 49, 90	syl2anc 579	. . . . 5 ⊢ ((𝑅 Or 𝐴 ∧ 𝐴 ∈ Fin) → 𝑂 Isom E , 𝑅 (dom 𝑂, 𝐴))
92		isotr 6777	. . . . 5 ⊢ (((◡𝐺 ↾ 𝐵) Isom < , E ((1...(♯‘𝐴)), dom 𝑂) ∧ 𝑂 Isom E , 𝑅 (dom 𝑂, 𝐴)) → (𝑂 ∘ (◡𝐺 ↾ 𝐵)) Isom < , 𝑅 ((1...(♯‘𝐴)), 𝐴))
93	89, 91, 92	syl2anc 579	. . . 4 ⊢ ((𝑅 Or 𝐴 ∧ 𝐴 ∈ Fin) → (𝑂 ∘ (◡𝐺 ↾ 𝐵)) Isom < , 𝑅 ((1...(♯‘𝐴)), 𝐴))
94		isof1o 6764	. . . 4 ⊢ ((𝑂 ∘ (◡𝐺 ↾ 𝐵)) Isom < , 𝑅 ((1...(♯‘𝐴)), 𝐴) → (𝑂 ∘ (◡𝐺 ↾ 𝐵)):(1...(♯‘𝐴))–1-1-onto→𝐴)
95		f1of 6319	. . . 4 ⊢ ((𝑂 ∘ (◡𝐺 ↾ 𝐵)):(1...(♯‘𝐴))–1-1-onto→𝐴 → (𝑂 ∘ (◡𝐺 ↾ 𝐵)):(1...(♯‘𝐴))⟶𝐴)
96	93, 94, 95	3syl 18	. . 3 ⊢ ((𝑅 Or 𝐴 ∧ 𝐴 ∈ Fin) → (𝑂 ∘ (◡𝐺 ↾ 𝐵)):(1...(♯‘𝐴))⟶𝐴)
97		fzfid 12979	. . 3 ⊢ ((𝑅 Or 𝐴 ∧ 𝐴 ∈ Fin) → (1...(♯‘𝐴)) ∈ Fin)
98		fex 6681	. . 3 ⊢ (((𝑂 ∘ (◡𝐺 ↾ 𝐵)):(1...(♯‘𝐴))⟶𝐴 ∧ (1...(♯‘𝐴)) ∈ Fin) → (𝑂 ∘ (◡𝐺 ↾ 𝐵)) ∈ V)
99	96, 97, 98	syl2anc 579	. 2 ⊢ ((𝑅 Or 𝐴 ∧ 𝐴 ∈ Fin) → (𝑂 ∘ (◡𝐺 ↾ 𝐵)) ∈ V)
100		isoeq1 6758	. . 3 ⊢ (𝑓 = (𝑂 ∘ (◡𝐺 ↾ 𝐵)) → (𝑓 Isom < , 𝑅 ((1...(♯‘𝐴)), 𝐴) ↔ (𝑂 ∘ (◡𝐺 ↾ 𝐵)) Isom < , 𝑅 ((1...(♯‘𝐴)), 𝐴)))
101	100	spcegv 3445	. 2 ⊢ ((𝑂 ∘ (◡𝐺 ↾ 𝐵)) ∈ V → ((𝑂 ∘ (◡𝐺 ↾ 𝐵)) Isom < , 𝑅 ((1...(♯‘𝐴)), 𝐴) → ∃𝑓 𝑓 Isom < , 𝑅 ((1...(♯‘𝐴)), 𝐴)))
102	99, 93, 101	sylc 65	1 ⊢ ((𝑅 Or 𝐴 ∧ 𝐴 ∈ Fin) → ∃𝑓 𝑓 Isom < , 𝑅 ((1...(♯‘𝐴)), 𝐴))

Syntax hints:   → wi 4   ↔ wb 197   ∧ wa 384   = wceq 1652  ∃wex 1874   ∈ wcel 2155  Vcvv 3349   ∩ cin 3730   ⊆ wss 3731  {csn 4333   class class class wbr 4808   ↦ cmpt 4887   E cep 5188   Or wor 5196   We wwe 5234  ^◡ccnv 5275  dom cdm 5276   ↾ cres 5278   “ cima 5279   ∘ ccom 5280  Ord word 5906  Oncon0 5907  ⟶wf 6063  –1-1-onto→wf1o 6066  ‘cfv 6067   Isom wiso 6068  (class class class)co 6841  ωcom 7262  reccrdg 7708   ≈ cen 8156  Fincfn 8159  OrdIsocoi 8620  cardccrd 9011  0cc0 10188  1c1 10189   + caddc 10191   < clt 10327   ≤ cle 10328   − cmin 10519  ℕcn 11273  ℕ₀cn0 11537  ℤcz 11623  ℤ_≥cuz 11885  ...cfz 12532  ♯chash 13320

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1890  ax-4 1904  ax-5 2005  ax-6 2069  ax-7 2105  ax-8 2157  ax-9 2164  ax-10 2183  ax-11 2198  ax-12 2211  ax-13 2349  ax-ext 2742  ax-rep 4929  ax-sep 4940  ax-nul 4948  ax-pow 5000  ax-pr 5061  ax-un 7146  ax-cnex 10244  ax-resscn 10245  ax-1cn 10246  ax-icn 10247  ax-addcl 10248  ax-addrcl 10249  ax-mulcl 10250  ax-mulrcl 10251  ax-mulcom 10252  ax-addass 10253  ax-mulass 10254  ax-distr 10255  ax-i2m1 10256  ax-1ne0 10257  ax-1rid 10258  ax-rnegex 10259  ax-rrecex 10260  ax-cnre 10261  ax-pre-lttri 10262  ax-pre-lttrn 10263  ax-pre-ltadd 10264  ax-pre-mulgt0 10265

This theorem depends on definitions:  df-bi 198  df-an 385  df-or 874  df-3or 1108  df-3an 1109  df-tru 1656  df-ex 1875  df-nf 1879  df-sb 2062  df-mo 2564  df-eu 2581  df-clab 2751  df-cleq 2757  df-clel 2760  df-nfc 2895  df-ne 2937  df-nel 3040  df-ral 3059  df-rex 3060  df-reu 3061  df-rmo 3062  df-rab 3063  df-v 3351  df-sbc 3596  df-csb 3691  df-dif 3734  df-un 3736  df-in 3738  df-ss 3745  df-pss 3747  df-nul 4079  df-if 4243  df-pw 4316  df-sn 4334  df-pr 4336  df-tp 4338  df-op 4340  df-uni 4594  df-int 4633  df-iun 4677  df-br 4809  df-opab 4871  df-mpt 4888  df-tr 4911  df-id 5184  df-eprel 5189  df-po 5197  df-so 5198  df-fr 5235  df-se 5236  df-we 5237  df-xp 5282  df-rel 5283  df-cnv 5284  df-co 5285  df-dm 5286  df-rn 5287  df-res 5288  df-ima 5289  df-pred 5864  df-ord 5910  df-on 5911  df-lim 5912  df-suc 5913  df-iota 6030  df-fun 6069  df-fn 6070  df-f 6071  df-f1 6072  df-fo 6073  df-f1o 6074  df-fv 6075  df-isom 6076  df-riota 6802  df-ov 6844  df-oprab 6845  df-mpt2 6846  df-om 7263  df-1st 7365  df-2nd 7366  df-wrecs 7609  df-recs 7671  df-rdg 7709  df-1o 7763  df-er 7946  df-en 8160  df-dom 8161  df-sdom 8162  df-fin 8163  df-oi 8621  df-card 9015  df-pnf 10329  df-mnf 10330  df-xr 10331  df-ltxr 10332  df-le 10333  df-sub 10521  df-neg 10522  df-nn 11274  df-n0 11538  df-z 11624  df-uz 11886  df-fz 12533  df-hash 13321

This theorem is referenced by:  fz1iso  13446